/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef META_INTERFACE_SIMPLE_EVENT_H
#define META_INTERFACE_SIMPLE_EVENT_H

#include <meta/base/meta_types.h>
#include <meta/interface/intf_event.h>

META_BEGIN_NAMESPACE()

/**
 * @brief Helper class to define event types easily.
 * Example:
 *     struct IOnEventInfo {
 *         constexpr static BASE_NS::Uid UID { "uid..." };
 *     };
 *     using IOnEvent = META_NS::SimpleEvent<IOnEventInfo, void(int myparameter)>;
 * IOnEvent is event type that can be used with META(_IMPLEMENT)_EVENT macros.
 */
template<typename MyEvent, typename Signature = void()>
class SimpleEvent;

template<typename MyEvent, typename... Args>
class SimpleEvent<MyEvent, void(Args...)> : public IEventCallable<MyEvent, void, Args...> {
public:
    constexpr static char const *NAME { MyEvent::NAME };
};

// NOLINTBEGIN(readability-identifier-naming)
/**
 * @brief Check if type is an event.
 */
template<typename Type>
constexpr bool IsEvent_v = BASE_NS::is_convertible_v<const Type*, const IEvent*>;
// NOLINTEND(readability-identifier-naming)

META_END_NAMESPACE()

#endif